Trigger Type: Select a trigger type by pressing this submenu key to toggle among No Trig, GPS, or Ext. The active state is underlined on the face of the virtual submenu key.

Ext Trigger Polarity: Press this submenu key to toggle either Rising or Falling polarity of external trigger.

Tau Offset: Press this submenu key to add an offset (5 sec is the maximum offset that can be entered) to the current Tau value.

Back: Disregards any entry and returns to Setup Menu.